High-resilience connecting adhesive layer structure for non-inductive waistline

Abstract

The utility model relates to a high-resilience connecting adhesive layer structure for a non-inductive waistline, which comprises non-woven fabrics and fine denier spandex filaments which are connected into a whole through adhesive layers, and is characterized in that the adhesive layers are arranged at intervals along the length direction of the fine denier spandex filaments; meanwhile, reinforcing glue scraping layers are arranged in the positions, at the point breaking positions of the fine denier spandex filaments, of the two waist side edges of the non-inductive waistline and the ends of the fine denier spandex filaments respectively, and every two adjacent reinforcing glue scraping layers on the two waist side edges of the non-inductive waistline can cover all the fine denier spandex filaments; in the spot breaking position of the fine denier spandex yarn, the reinforcing glue scraping layer can cover all the spot-broken fine denier spandex yarn, creep retraction of the fine denier spandex yarn is reduced, the glue amount is effectively reduced, the influence of hot melt glue on the elastic force loss of the fine denier spandex yarn, especially the loss of resilience force, is reduced, and the fine denier spandex yarn has high resilience.

Description

Technical Field

[0001] The utility model belongs to the technical field of disposable sanitary products, and in particular relates to a high-resilience connecting adhesive layer structure for a non-sensitive waistline. Technical Background

[0002] Pull-up pants, also known as growth pants, are a high-end product among disposable sanitary products. They have the functions of both diapers and ordinary small underwear, and are mainly used for training children of school age when crawling or walking. The biggest difference between pull-up pants and diapers is the elastic waist. As consumers have higher requirements for the quality of pull-up pants, they not only require excellent physical comfort, but also require a softer and softer hand feel, and the requirements for elastic waist are getting higher and higher. Therefore, disposable sanitary products with a senseless waist function, especially pull-up pants with a senseless waist, are the hot spots and trends of current product development. In existing pull-up pants with a senseless waist, rubber root glue (a hot-melt pressure-sensitive adhesive, also a hot-melt adhesive) is used to compound fine denier spandex yarn with a non-woven fabric substrate.

[0003] However, the existing invisible waistband of disposable sanitary products is generally made by scraping fine-denier spandex yarns and hot-melt adhesive continuously along the waistband horizontally on one or both sides of the spandex yarns, or spraying the adhesive in a winding manner so that the adhesive yarns are wound around the spandex yarns, and then directly compounded with the inner and outer waistband non-woven fabric substrates. The amount of adhesive applied needs to be 0.015-0.030g / m, otherwise, the fine-denier spandex yarns will shrink and creep.

[0004] However, due to the addition of tackifying resins and cycloalkane oils and other ingredients into the hot melt adhesive, the hot melt adhesive has weak elasticity, especially poor resilience, and a large amount of adhesive coating on the fine denier spandex yarn directly wraps the fine denier spandex yarn, or most of it is wrapped on the fine denier spandex yarn, which weakens the elasticity of the fine denier spandex yarn, especially the resilience is significantly weakened. At the same time, it will cause the elasticity of each batch of the seamless waistline products to be unstable, thereby increasing the risk of the product falling and leaking urine.

[0005] The present application optimizes the connecting adhesive layer structure of the fine-denier spandex yarn and arranges a reinforced scraping adhesive layer, thereby reducing the thickness of the adhesive layer wrapped or covered on the surface of the fine-denier spandex yarn. Therefore, the influence of the hot-melt adhesive connecting layer on the elasticity of the spandex yarn can be effectively reduced. Utility Model Content

[0006] In order to solve the problem that the adhesive layer structure of the non-sense waist in the existing disposable sanitary products affects the resilience of the fine-denier spandex yarn, the utility model provides a novel fine-denier spandex yarn connection adhesive layer structure, and provides a technical solution of setting the adhesive layer at intervals and setting a reinforced scraping adhesive layer while ensuring the reinforcement and fixation of the point-broken elastic band to reduce the elastic band retraction. At the same time, in the interval area between the two adhesive layers, an intermittent scraping adhesive layer or an ultrasonic bonding point is set at the upper bonding position or / and the lower bonding position of the fine-denier spandex yarn, which can effectively reduce the amount of adhesive and reduce the influence of hot melt adhesive on the elastic loss of the fine-denier spandex yarn, especially the loss of resilience.

[0007] Specifically, the utility model adopts the following technical solutions:

[0008] A high-resilience connecting adhesive layer structure for a non-sensitive waistline comprises a non-woven fabric, fine-denier spandex yarns, and the non-woven fabric and the fine-denier spandex yarns are connected together through an adhesive layer to form the non-sensitive waistline, wherein the adhesive layer is arranged at intervals along the length direction of the fine-denier spandex yarns.

[0009] At the same time, a strengthening scraping glue layer is provided at the two waist sides of the non-sensing waistline, in the adhesive layer at the point where the fine-denier spandex yarn is broken, and at the ends of the fine-denier spandex yarn, wherein:

[0010] On the two waist sides of the invisible waistline, every two adjacent reinforced scraped rubber layers can cover all the fine denier spandex yarns; at the fine denier spandex yarn break position, the reinforced scraped rubber layer can cover all the broken fine denier spandex yarns, so that the fine denier spandex yarns have high resilience.

[0011] Preferably, in the interval area between the two adhesive layers, there is also an intermittent scraping glue layer which is staggered or irregularly distributed up and down and is arranged at the upper bonding position and / or the lower bonding position of the fine denier spandex yarn.

[0012] Preferably, ultrasonic bonding points are provided on the sides of the fine-denier spandex yarns to fix the fine-denier spandex yarns.

[0013] Preferably, the width of the reinforced scraping rubber layer is 5-20 mm.

[0014] Preferably, the diameter of the ultrasonic bonding point is 0.5-2.5 mm, and the shape is one of a circle, an ellipse, and a diamond. The intervals between adjacent ultrasonic points are equidistant or unequal, and the spacing is 3.0-10.0 mm.

[0015] Preferably, winding glue dots wound on the fine-denier spandex yarn are provided between the intermittent scraping glue layers, the glue area diameter of the winding glue dots is 0.1-0.3 mm, and the gap between adjacent winding glue dots is 1.0-3.0 mm.

[0016] Preferably, the winding glue points are asymmetrically distributed at the upper bonding position and the lower bonding position of the fine denier spandex yarn. The asymmetrical distribution is an upper and lower staggered distribution.

[0017] Preferably, the recovery rate of the non-sensitive waist after stretching is above 70%, its F80% total resilience is above 400 grams-force, and the wrinkle stretching ratio is above 2.8 times.

[0018] The beneficial effects achieved by the utility model are as follows: the connecting adhesive layer structure of the utility model not only reduces the creep shrinkage of the fine-denier spandex yarn, but also effectively reduces the amount of adhesive, reduces the influence of hot-melt adhesive on the elastic loss of the fine-denier spandex yarn, especially the loss of resilience, so that the fine-denier spandex yarn has high resilience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the fine denier spandex yarn connecting the adhesive layer.

[0020] Figure 2 It is a schematic diagram of adhesive layers and intermittent scraping adhesive layers arranged at intervals along the length direction of fine denier spandex yarns.

[0021] Figure 3 It is a schematic diagram of the location of ultrasonic bonding points.

[0022] Figure 4 It is a schematic diagram of the winding glue dots wound on the fine denier spandex yarn. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0024] Please also refer to the attached Figure 1-4 The utility model discloses a non-feeling waistband with a high-resilience connecting adhesive layer structure, which is a non-feeling elastic waistband 1, comprising a non-woven fabric (not shown in the figure), a fine-denier spandex yarn 2, and the non-woven fabric and the fine-denier spandex yarn are connected together through an adhesive layer to form the non-feeling waistband, and the adhesive layer 6 is arranged at intervals along the length direction of the fine-denier spandex yarn. The fine-denier spandex in the utility model has a denier of 70-280D.

[0025] At the same time, at the two waist sides 3A, 3B of the non-sensitive waist, the ends of the fine-denier spandex yarns are respectively provided with reinforcing scraping rubber layers 5A, 5B. Among them: at the two waist sides of the non-sensitive waist, every two adjacent reinforcing scraping rubber layers 5A, 5B can respectively cover all the fine-denier spandex yarns.

[0026] At the same time, in the adhesive layer at the fine-denier spandex yarn break position 4, the ends of the fine-denier spandex yarn are respectively provided with reinforcing scraping glue layers 5C and 5D. Among them, at the fine-denier spandex yarn break position, the reinforcing scraping glue layers 5C and 5D can respectively cover all the fine-denier spandex yarns that are broken, so that the fine-denier spandex yarn has high resilience.

[0027] As a preferred embodiment, the width of the reinforced scraping rubber layer is 5-20 mm.

[0028] Through the above implementation mode, the utility model performs reinforcement at the point breaking position of the fine-denier spandex yarn, thereby ensuring that the creep shrinkage of the fine-denier spandex yarn is reduced.

[0029] As a further preferred embodiment, the utility model further provides an intermittent scraping glue layer 62 in an upper bonding position and / or a lower bonding position of the fine denier spandex yarn in an interval area 61 between the two adhesive layers, which is staggered or irregularly distributed up and down.

[0030] In addition, based on the above embodiment, an ultrasonic bonding point 7 can be provided on the side of the fine denier spandex yarn to fix the fine denier spandex yarn. As a preferred embodiment, the diameter of the ultrasonic bonding point 7 is 0.5-2.5 mm, and the shape is one of a circle, an ellipse, and a diamond. The intervals between adjacent ultrasonic points are equidistant or unequal, and the spacing is 3.0-10.0 mm.

[0031] Through the above-mentioned implementation mode, the utility model can effectively reduce the amount of glue and the influence of hot melt adhesive on the resilience of the fine denier spandex yarn by applying glue at the upper bonding position and / or the lower bonding position of the fine denier spandex yarn, or in the transverse direction in an intermittent gluing manner (intermittent scraping glue layer) or ultrasonic bonding points, thereby giving the fine denier spandex yarn high resilience.

[0032] On the basis of the above implementation, an irregular glue spraying implementation is further adopted, wherein winding glue dots 8 wound on the fine denier spandex yarn are provided between the intermittent scraping glue layers, the glue area diameter of the winding glue dots 8 is 0.1-0.3mm, and the gap between adjacent winding glue dots is 1.0-3.0mm.

[0033] The winding glue points are asymmetrically distributed at the upper bonding position and the lower bonding position of the fine denier spandex yarn. Specifically, the asymmetrical distribution is an upper and lower staggered distribution.

[0034] The utility model implements the reinforced scraping glue layer on the fine-denier spandex yarn by optimizing the adhesive layer connection structure of the fine-denier spandex yarn, and further forms an intermittent scraping glue layer by an interval gluing method, thereby reducing the amount of glue wrapped or covered on the surface of the fine-denier spandex yarn, and thus can effectively reduce the influence of hot melt adhesive on the elasticity of the fine-denier spandex yarn.

[0035] Performance Testing:

[0036] (1) Test method: GB / T 24218.102-2022 Textiles - Test methods for nonwoven fabrics - Part 102: Determination of tensile elasticity. The test stretch ratio is set to 100%. At the same time, the tests of the stretch recovery performance of the elastic waist and the F80% resilience are conventional test methods in the art, where the F80% resilience refers to the mechanical properties when the elastic waist is recovered to 80% after being stretched to 100%, which are familiar to those skilled in the art.

[0037] (2) Test samples: 3 non-sensitive waist samples of the present invention; 1 comparative sample, obtained from commercially available pull-up pants.

[0038] (3) Test results:

[0039]

[0040] The wrinkle stretching ratio of the non-sensitive waist is more than 2.8 times, and its stretch recovery rate is more than 70%, that is, the retention rate is more than 70%. At the same time, after the non-sensitive waist is stretched, its F80% total resilience is more than 400 grams. It can be seen that the utility model reduces the creep shrinkage of the fine denier spandex yarn by implementing the connecting adhesive layer structure, and can effectively reduce the amount of adhesive, and reduce the influence of hot melt adhesive on the elastic loss of the fine denier spandex yarn, especially the loss of resilience.

[0041] The adhesive layer, reinforced scraping glue layer, intermittent scraping glue layer, and winding glue points described in the utility model can all be achieved through existing gluing methods or processes, which are all familiar to those skilled in the art, and the ultrasonic bonding points also belong to conventional bonding or compounding methods in the field.

[0042] The above description shows and describes the preferred embodiments of the utility model. As mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A high-resilience connecting adhesive layer structure for a non-sense waistline, comprising a non-woven fabric and fine-denier spandex yarn, wherein the non-woven fabric and the fine-denier spandex yarn are connected together through an adhesive layer, characterized in that: The adhesive layers are arranged at intervals along the length direction of the fine denier spandex yarn; At the same time, in the adhesive layers at the two waist sides of the non-sensitive waistline and the break positions of the fine-denier spandex yarns, the ends of the fine-denier spandex yarns are respectively provided with reinforcing scrape glue layers, wherein: at the two waist sides of the non-sensitive waistline, every two adjacent reinforcing scrape glue layers can cover all the fine-denier spandex yarns; at the break positions of the fine-denier spandex yarns, the reinforcing scrape glue layers can cover all the broken fine-denier spandex yarns, so that the fine-denier spandex yarns have high resilience.

2. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 1, characterized in that: In the interval area between the two adhesive layers, there is also an intermittent scraping glue layer which is staggered or irregularly distributed up and down and is arranged at the upper bonding position and / or the lower bonding position of the fine denier spandex yarn.

3. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 2, characterized in that: Ultrasonic bonding points are arranged on the sides of the fine-denier spandex yarns to fix the fine-denier spandex yarns.

4. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 1 or 2, characterized in that: The width of the reinforced scraping rubber layer is 5-20 mm.

5. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 3 is characterized in that: The diameter of the ultrasonic bonding point is 0.5-2.5 mm, and the shape is one of a circle, an ellipse, and a diamond. The intervals between adjacent ultrasonic points are equidistant or unequal, and the spacing is 3.0-10.0 mm.

6. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 2, 3 or 5, characterized in that: Between the two discontinuous scraping glue layers, there are winding glue points wound on the fine denier spandex yarn, the glue area diameter of the winding glue points is 0.1-0.3mm, and the gap between adjacent winding glue points is 1.0-3.0mm.

7. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 6, characterized in that: The winding glue points are asymmetrically distributed at the upper bonding position and the lower bonding position of the fine denier spandex yarn.

8. The high-resilience connecting adhesive layer structure for a non-sense waistline according to claim 7, characterized in that: The asymmetric distribution is an up-and-down staggered distribution.

9. The high-resilience connecting adhesive layer structure for a non-sense waistline according to any one of claims 1-3, 5, 7-8, characterized in that: The stretch recovery rate of the non-sensitive waistline is more than 70%, its F80% total resilience is more than 400 grams, and the wrinkle stretching ratio is more than 2.8 times.

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